About that BASS RECORDING.
Here is what Mark Ranson said about it:
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Is it possible to record a song like “Uptown Funk” without using modern recording technology?
To be honest, there’s not a lot of massive studio trickery in this song.
Bruno’s playing drums, I’m playing guitar, Jeff Bhasker’s on keys and the bass. All the instrumentation is pretty natural—even the vocal bass in the background. It might sound a little more acoustic [without technology] but the song is still, it’s electro-funk in a way. There might be certain frequencies that are the result of modern equipment but overall we could do the song either way and you would get the impression of what it was. It wouldn’t sound like
“Levels” by Avicii.
There wasn’t a lot of layering. We added some old school drum machine claps and snares. But for the most part, it’s a live recording. That was what we set out to do with this song, to make a piece of dance music created by living people..."
"How Mark Ronson’s No. 1 hit Uptown Funk got made — and why it caused him to vomit and faint"
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"Uptown Funk started life as a keyboard riff Bruno Mars, who sings the track, would jam with his band at soundcheck while touring
Unorthodox Jukebox, the 2012 album Ronson helped produce for Mars that went on to sell over six million copies.
Mars and his band had got the hook ‘Don’t believe me just watch’ from Trinidad James’ 2012 song
All Gold Everything.
“They were doing this loose jam slightly inspired by that Trinidad James record,” Ronson says.
His ear sensing it was something special, Ronson got in a studio with Mars on drums, producer Jeff Bhasker (Kanye West, Lana Del Rey, Fun) on keyboards and himself on bass.
“We got the basic groove and the first verse that first night, the rest took a lot longer.”
P.S. Go figure...